Move a bunch of code in content\common (as well as a few left in renderer) to the content namespace.

content/common/indexed_db/proxy_webidbtransaction_impl.cc

Index: content/common/indexed_db/proxy_webidbtransaction_impl.cc
===================================================================
--- content/common/indexed_db/proxy_webidbtransaction_impl.cc	(revision 163290)
+++ content/common/indexed_db/proxy_webidbtransaction_impl.cc	(working copy)
@@ -16,6 +16,8 @@
 using WebKit::WebIDBTransactionCallbacks;
 using WebKit::WebString;
 
+namespace content {
+
 RendererWebIDBTransactionImpl::RendererWebIDBTransactionImpl(
     int32 idb_transaction_id)
     : idb_transaction_id_(idb_transaction_id) {
@@ -65,3 +67,5 @@
   dispatcher->RegisterWebIDBTransactionCallbacks(callbacks,
                                                  idb_transaction_id_);
 }
+
+}  // namespace content